18. Subjects who have an abnormality in the 12-lead ECG that, in the opinion of the investigator, increases the risk of participating in the study; such as QTcB interval >450 msec, 2nd or 3rd degree Atrioventricular block, complete left bundle branch block, complete right bundle branch block or Wolff-Parkinson-White Syndrome defined as PR<110 msec, confirmed by a repeat ECG.